Prune 27 obsolete ports

FreeBSD Ports maintainers have already deleted the following:
  converters/ruby-bsdconv
  devel/libgsf-gnome
  devel/p5-Oogly
  devel/py-libgsf
  devel/ruby-term-ansicolor
  dns/bind97
  dns/bind97-sdb
  editors/tamago-emacs21
  graphics/jpeg2ps-a4
  graphics/jpeg2ps-letter
  japanese/navi2ch-emacs21
  lang/tcl83
  net-mgmt/nettop
  print/a2ps-a4
  print/a2ps-letter
  print/a2ps-letterdj
  print/c2ps-a4
  print/c2ps-letter
  print/html2ps-a4
  print/html2ps-letter
  print/psutils-a4
  print/psutils-letter
  security/gnupg-idea
  www/ilias3
  www/p5-Dancer-Plugin-DataFu
  www/typo346
  x11-toolkits/tk83